$ git clone -n https://src.fedoraproject.org/rpms/python-jaraco-collections.git /var/lib/mock/f45-build-31167-650/root/chroot_tmpdir/scmroot/python-jaraco-collections
Cloning into '/var/lib/mock/f45-build-31167-650/root/chroot_tmpdir/scmroot/python-jaraco-collections'...
$ git fetch origin e08413708586973fa96872d4a1ec34aeb8cf464d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jaraco-collections
 * [new ref]         e08413708586973fa96872d4a1ec34aeb8cf464d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e084137 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild